291 lines
9.0 KiB
C#
291 lines
9.0 KiB
C#
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//
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// DefaultLayout.cs
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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// Copyright (c) 2006 Jonathan Pobst
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//
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// Authors:
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// Jonathan Pobst (monkey@jpobst.com)
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// Stefan Noack (noackstefan@googlemail.com)
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//
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using System;
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using System.Drawing;
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namespace System.Windows.Forms.Layout
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{
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class DefaultLayout : LayoutEngine
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{
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void LayoutDockedChildren (Control parent, Control[] controls)
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{
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Rectangle space = parent.DisplayRectangle;
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MdiClient mdi = null;
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// Deal with docking; go through in reverse, MS docs say that lowest Z-order is closest to edge
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for (int i = controls.Length - 1; i >= 0; i--) {
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Control child = controls[i];
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Size child_size = child.Size;
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if (child.AutoSize)
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child_size = GetPreferredControlSize (child);
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if (!child.VisibleInternal
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|| child.ControlLayoutType == Control.LayoutType.Anchor)
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continue;
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// MdiClient never fills the whole area like other controls, have to do it later
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if (child is MdiClient) {
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mdi = (MdiClient)child;
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continue;
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}
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switch (child.Dock) {
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case DockStyle.None:
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// Do nothing
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break;
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case DockStyle.Left:
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child.SetBoundsInternal (space.Left, space.Y, child_size.Width, space.Height, BoundsSpecified.None);
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space.X += child.Width;
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space.Width -= child.Width;
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break;
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case DockStyle.Top:
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child.SetBoundsInternal (space.Left, space.Y, space.Width, child_size.Height, BoundsSpecified.None);
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space.Y += child.Height;
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space.Height -= child.Height;
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break;
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case DockStyle.Right:
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child.SetBoundsInternal (space.Right - child_size.Width, space.Y, child_size.Width, space.Height, BoundsSpecified.None);
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space.Width -= child.Width;
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break;
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case DockStyle.Bottom:
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child.SetBoundsInternal (space.Left, space.Bottom - child_size.Height, space.Width, child_size.Height, BoundsSpecified.None);
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space.Height -= child.Height;
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break;
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case DockStyle.Fill:
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child.SetBoundsInternal (space.Left, space.Top, space.Width, space.Height, BoundsSpecified.None);
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break;
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}
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}
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// MdiClient gets whatever space is left
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if (mdi != null)
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mdi.SetBoundsInternal (space.Left, space.Top, space.Width, space.Height, BoundsSpecified.None);
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}
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void LayoutAnchoredChildren (Control parent, Control[] controls)
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{
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Rectangle space = parent.ClientRectangle;
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for (int i = 0; i < controls.Length; i++) {
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int left;
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int top;
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int width;
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int height;
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Control child = controls[i];
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if (!child.VisibleInternal
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|| child.ControlLayoutType == Control.LayoutType.Dock)
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continue;
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AnchorStyles anchor = child.Anchor;
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left = child.Left;
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top = child.Top;
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width = child.Width;
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height = child.Height;
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if ((anchor & AnchorStyles.Right) != 0) {
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if ((anchor & AnchorStyles.Left) != 0)
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width = space.Width - child.dist_right - left;
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else
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left = space.Width - child.dist_right - width;
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}
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else if ((anchor & AnchorStyles.Left) == 0) {
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// left+=diff_width/2 will introduce rounding errors (diff_width removed from svn after r51780)
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// This calculates from scratch every time:
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left = left + (space.Width - (left + width + child.dist_right)) / 2;
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child.dist_right = space.Width - (left + width);
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}
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if ((anchor & AnchorStyles.Bottom) != 0) {
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if ((anchor & AnchorStyles.Top) != 0)
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height = space.Height - child.dist_bottom - top;
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else
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top = space.Height - child.dist_bottom - height;
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}
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else if ((anchor & AnchorStyles.Top) == 0) {
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// top += diff_height/2 will introduce rounding errors (diff_height removed from after r51780)
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// This calculates from scratch every time:
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top = top + (space.Height - (top + height + child.dist_bottom)) / 2;
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child.dist_bottom = space.Height - (top + height);
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}
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// Sanity
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if (width < 0)
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width = 0;
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if (height < 0)
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height = 0;
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child.SetBoundsInternal (left, top, width, height, BoundsSpecified.None);
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}
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}
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void LayoutAutoSizedChildren (Control parent, Control[] controls)
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{
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for (int i = 0; i < controls.Length; i++) {
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int left;
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int top;
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Control child = controls[i];
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if (!child.VisibleInternal
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|| child.ControlLayoutType == Control.LayoutType.Dock
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|| !child.AutoSize)
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continue;
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AnchorStyles anchor = child.Anchor;
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left = child.Left;
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top = child.Top;
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Size preferredsize = GetPreferredControlSize (child);
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if (((anchor & AnchorStyles.Left) != 0) || ((anchor & AnchorStyles.Right) == 0))
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child.dist_right += child.Width - preferredsize.Width;
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if (((anchor & AnchorStyles.Top) != 0) || ((anchor & AnchorStyles.Bottom) == 0))
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child.dist_bottom += child.Height - preferredsize.Height;
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child.SetBoundsInternal (left, top, preferredsize.Width, preferredsize.Height, BoundsSpecified.None);
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}
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}
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void LayoutAutoSizeContainer (Control container)
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{
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int left;
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int top;
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int width;
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int height;
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if (!container.VisibleInternal || container.ControlLayoutType == Control.LayoutType.Dock || !container.AutoSize)
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return;
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left = container.Left;
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top = container.Top;
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Size preferredsize = container.PreferredSize;
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if (container.GetAutoSizeMode () == AutoSizeMode.GrowAndShrink) {
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width = preferredsize.Width;
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height = preferredsize.Height;
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} else {
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width = container.ExplicitBounds.Width;
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height = container.ExplicitBounds.Height;
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if (preferredsize.Width > width)
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width = preferredsize.Width;
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if (preferredsize.Height > height)
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height = preferredsize.Height;
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}
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// Sanity
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if (width < container.MinimumSize.Width)
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width = container.MinimumSize.Width;
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if (height < container.MinimumSize.Height)
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height = container.MinimumSize.Height;
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if (container.MaximumSize.Width != 0 && width > container.MaximumSize.Width)
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width = container.MaximumSize.Width;
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if (container.MaximumSize.Height != 0 && height > container.MaximumSize.Height)
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height = container.MaximumSize.Height;
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container.SetBoundsInternal (left, top, width, height, BoundsSpecified.None);
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}
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public override bool Layout (object container, LayoutEventArgs args)
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{
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Control parent = container as Control;
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Control[] controls = parent.Controls.GetAllControls ();
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LayoutDockedChildren (parent, controls);
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LayoutAnchoredChildren (parent, controls);
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LayoutAutoSizedChildren (parent, controls);
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if (parent is Form) LayoutAutoSizeContainer (parent);
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return false;
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}
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private Size GetPreferredControlSize (Control child)
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{
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int width;
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int height;
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Size preferredsize = child.PreferredSize;
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if (child.GetAutoSizeMode () == AutoSizeMode.GrowAndShrink || (child.Dock != DockStyle.None && !(child is Button) && !(child is FlowLayoutPanel))) {
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width = preferredsize.Width;
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height = preferredsize.Height;
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} else {
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width = child.ExplicitBounds.Width;
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height = child.ExplicitBounds.Height;
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if (preferredsize.Width > width)
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width = preferredsize.Width;
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if (preferredsize.Height > height)
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height = preferredsize.Height;
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}
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if (child.AutoSize && child is FlowLayoutPanel && child.Dock != DockStyle.None) {
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switch (child.Dock) {
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case DockStyle.Left:
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case DockStyle.Right:
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if (preferredsize.Width < child.ExplicitBounds.Width && preferredsize.Height < child.Parent.PaddingClientRectangle.Height)
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width = preferredsize.Width;
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break;
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case DockStyle.Top:
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case DockStyle.Bottom:
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if (preferredsize.Height < child.ExplicitBounds.Height && preferredsize.Width < child.Parent.PaddingClientRectangle.Width)
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height = preferredsize.Height;
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break;
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}
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}
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// Sanity
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if (width < child.MinimumSize.Width)
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width = child.MinimumSize.Width;
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if (height < child.MinimumSize.Height)
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height = child.MinimumSize.Height;
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if (child.MaximumSize.Width != 0 && width > child.MaximumSize.Width)
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width = child.MaximumSize.Width;
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if (child.MaximumSize.Height != 0 && height > child.MaximumSize.Height)
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height = child.MaximumSize.Height;
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return new Size (width, height);
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}
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}
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}
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